Electrical Machines
Which of following DC motors will have percentage increase of input current for the same percentage increase in torque?

 Series.
 Cummulative compound.
  Shunt.
 Differntical compound.

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Electrical Machines
Consider the following statements: To control the speed of a dc shunt motor above the base speed over a reasonably wide range, the motor must 1. have compensating winding 2. have interpole winding 3. be started using a 3-point starter 4. be started using a 4-point starter Of these statements

 1 and 3 are correct
 1, 2 and 3 are correct
 2 and 4 are correct
 1, 2 and 4 are correct

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